thin film transistor
TFT screen is the most commonly used and common material on mobile phone screen at present, which belongs to an active matrix liquid crystal display. TFT is equipped with a special lamp on the back of liquid crystal, which can actively control each independent pixel on the screen, thus greatly improving the reaction time. Generally, the reaction time of TFT is relatively fast, about 80 milliseconds, and the viewing angle is large, which can generally reach about 130 degrees, and it is mainly used for high-end products. TFT belongs to active matrix liquid crystal display, which is technically adopted? Active matrix? The method is to make transistor electrodes by thin film technology and scan them. Actively pull and control the opening and closing of any display point. When the light source irradiates, it first transmits light through the lower polarizer, with the help of liquid crystal molecules, and achieves the purpose of display through shading and light transmission.
Representative models are generally products of several years ago, such as Motorola MB860 and Samsung i9 100. The screen is characterized by good brightness, strong layering and high reduction, but its shortcomings are also obvious. Because it is driven by backlight, TFT consumes a lot of power and has poor visibility in the sun.
TFD screen
TFD screen is also called thin film diode translucent LCD screen. TFD technology is jointly developed by Seiko and Epson, which is specially used on mobile phone screens. TFD screen has better brightness and color saturation, and it also saves electricity than TFT. The biggest feature is that it can provide high-quality and easy-to-watch display regardless of whether the backlight is turned off (reflective mode) or on (transmissive mode), and it has the advantages of low power consumption, high image quality and high response speed.
UFB screen
UFB is a new type of mobile phone liquid crystal display device developed by Samsung, which has the characteristics of ultra-thin and high brightness. UFB is a display screen specially designed for mobile phones and PDA. With ultra-thin and high brightness, it can display 65,536 colors with a resolution of1.280x65,438+0.600. The display screen adopts special grating design, which can reduce the pixel spacing and obtain better image quality.
The contrast of UFB LCD screen is twice that of STN LCD screen, and its brightness is equivalent to that of TFT display screen in 65536 colors, but its power consumption is less than that of TFT display screen, and its price is similar to that of STN display screen, which can be said to combine the advantages of these two existing products.
Organic light emitting display
Organic light-emitting diode (OLED) is an organic light-emitting display, which belongs to a new product on mobile phone display and is known as? Dream monitor? . Organic light emitting diode display technology is different from the traditional liquid crystal display mode. It does not need backlight, and uses very thin organic material coating and glass substrate. These organic materials will emit light when current passes through them. In addition, the OLED display screen can be made lighter and thinner, with a larger viewing angle, and can significantly save power consumption. In the two major organic light-emitting diode technology systems, the low-molecular-weight organic light-emitting diode technology is mastered by Japan, while the technology and patents of polymer PLED are mastered by British technology company CDT.
However, although organic light-emitting diodes with better technology may replace TFT and other screens in the future, organic light-emitting display technology still has shortcomings such as short service life and difficult screen enlargement.
The difference between OLED and TFT is that TFT is a kind of liquid crystal, which needs light to see the image clearly, while OLED doesn't, and every pixel of it can emit light.
AMOLED
The full name of AMOLED is active matrix organic light emitting diode or active matrix organic light emitting diode. In terms of display efficiency, AMOLED has the advantages of faster response, higher contrast and wider viewing angle, which are naturally superior to TFT. In addition, AMOLED has self-luminous characteristics, so it can be made lighter and more energy-saving than TFT.
Another more important feature of AMOLED is that it does not need a backlight. AMOLED can save the cost of backlight module, which accounts for 3-40% of TFT LCD, but slightly heavier AMOLED also has disadvantages. Compared with other screens, under the same resolution, AMOLED has a slightly stronger graininess.
With the continuous development of AMOLED technology, more excellent AMOLED screens have been derived, such as Super AMOLED. That is, while the original AMOLED screen has the advantages of fast response, self-luminescence, excellent display effect and lower power consumption, removing the glass cover layer also brings better display effect in the sun. In short, it is an upgraded version of AMOLED. There is also Super AMOLED PLUS, whose improvement is that if calculated by pixels, the number of pixels in the new display will increase by 50%, and the contrast and outdoor readability will be improved compared with the previous Super AMOLED screen.
IPS hard screen
IPS hard screen technology is an advanced LCD panel technology in the world. A hard screen is a film with a layer of resin on its surface, just like people wearing glasses. The reason why IPS hard screen has a clear and ultra-stable dynamic display effect depends on its innovative horizontal conversion molecular arrangement, which changes the vertical molecular arrangement of VA soft screen, so it has a more stereoscopic and stable liquid crystal structure. From the surface, the hard screen is to add a hard protective film on the LCD panel to prevent the LCD screen from being poked by external hard objects.
Compared with traditional soft screen LCD, IPS hard screen LCD has faster response speed and smoother moving picture. It has the following advantages: 1, dynamic picture, no afterimage; 2, dynamic picture, uniform reaction speed; 3, dynamic picture, no color shift. The most classic model of IPS hard screen is Apple's iPhone4.
SLCD
SLCD, the full name of ultra-clear liquid crystal display, was developed by Sony Corporation. With the gorgeous contrast of Super AMOLED, the color is warmer and more natural according to the characteristics of LCD, which is suitable for human eyes to watch. Moreover, according to the typesetting of LCD, its resolution is consistent with the nominal and the screen is clear. SLCD is also a LCD screen, which does not emit light by itself. It can be regarded as a super version of TFT.
SLCD can meet the needs of different occasions and different signal inputs, with a service life of over 50,000 hours, no burns and injuries, and low maintenance cost. Any number of units can be combined to display a complete picture, and any picture can be superimposed on other pictures. Through the software, any signal can move on the spliced curtain wall in units of one screen. In addition, the viewing angle of the screen is also very good.
American standard edition
ASV technology is another breakthrough in Sharp's LCD panel production technology, which is mainly used for Sharp's high-end LCD. This technology mainly improves the viewing angle, reaction time, color contrast and screen brightness of the LCD screen by reducing the spacing between particles on the LCD panel, increasing the aperture on the LCD particles and adjusting the arrangement of the LCD particles as a whole. Under the comparison of the same screen area, the parameters and effects of the screen with ASV technology can be substantially improved compared with the ordinary LCD without ASV technology, and it is obviously superior to the screen with the same size in the market.
? Related reading: What should I do if the screen of my mobile phone fails?
1, turn off the phone, take out the battery, and let the phone stand for about five minutes;
2. Find a USB cable and connect it to the mobile phone;
3. Wash your hands or get your hands wet;
4. When the hand is wet, the thumb of the same hand touches the metal part at the other end of the USB cable, and the index finger presses to the ground for about two seconds;
5. When the back cover is removed, we can see that there is a small metal block next to the battery compartment, which is the mobile phone vibration generator, commonly known as vibrator. Because it is also directly connected to the main board of the mobile phone, we can do the same. When the hand is wet, the thumb of the same hand touches the vibrator and the index finger presses to the ground for about two seconds.
Method 2:
Blow the screen with a hot hair dryer (hair dryer), pay attention to the middle range, blow evenly, and feel the screen is hot (note: remove the battery of the machine).
Method 3:
The electric shock method, which uses the electrostatic device in the lighter to shock the screen (cover the faulty place with a paper towel soaked with water) and change the electric field, may not be all applicable, so everyone should be cautious!
Method 4:
Stick the broken part with transparent adhesive and tear it until the screen can be touched again.
Method 5:
When you desperately want to buy an external screen, you can try to do all the above schemes, doping and repeating them. It may take a long time to repeat the doping method, but 90% will be repaired successfully.